Blood Vessels

Q. Why an injection is administered in a vein and not an artery?

1. Veins have valves and prevent backflow.
2. Arteries have high pressure and puncture will lead to lot of blood loss.
3. Veins carry oxygen-rich blood from all parts of the body to the heart
4. Arteries carry carbon dioxide-rich blood to all parts of the body from the heart.

Q.

How does blood circulation occur in fishes?

Q.

Generally, blood vessels which carry pure blood are called ……………….. and blood vessels which carry impure blood are called …………….

1. veins ; arteries

2. arteries ; veins

3. None of the above

4. capillaries ; veins

Q.

Which among the following carry oxygenated blood?

1. All of the above

2. Aorta

3. Coronary artery

4. Pulmonary vein

Q.

Veins have valves to prevent the backflow of blood because the blood in veins flow ________.

1. at a low pressure

2. at atmospheric pressure

3. at a high pressure

4. at a neutral pressure

Q.

Deoxygenated blood from the heart enters into lungs via

1. Pulmonary vein

2. Pulmonary artery

3. superior vena cava

4. inferior vena cava

Q. what is the relationship between the rate of the heartbeat and the pulse rate ??


sir// ma'am pls answer fast as tomorrow I have exam

and pls give short and proper answers pls

Q.

What is the difference between monocytes, neutrophils, eosinophils, lymphocytes, and basophils?

Q.

Blood pressure is much greater in arteries than in veins.

1. True

2. False

Q.

Describe bilirubin metabolism?

Q. The _________ prevent(s) the mixing of oxygenated and deoxygenated blood in the heart.​

1. ventricles
2. aorta
3. atria
4. septum

Q.

What are the two types of agranulocytes of white blood cells?

Q.

Name the experiment which proves that food is transported through phloem.

Q.

Why is it called an artery if it does not carry oxygen-rich blood?

Q.

Name the chemical used to test the presence of $C{O}_2$ in exhaled air. [1 MARK]

Q.

The mature red blood cells of mammals are without nucleus and mitochondria. What does this signify?

Q.

The capillaries join together to form __.

Q.

How are RBCs adapted for carrying oxygen?

Q. Which of the following is not a characteristic of arteries?

1. They carry oxygen rich blood
2. Blood flows at high pressure
3. They have thick elastic walls
4. They have valves to prevent back flow

Q.

What is the difference between pulmonary vein and systemic vein

Q.

Who was the first person to observe and
describe red blood cells in humans?

Q.

The pulse beat is measured by the?

1. Artery

2. Capillary

3. Vein

4. None of these

Q.

Transport of organisms in plants and animals

Q.

Leucocytes are colorless due to

1. lack of water

2. lack of hemoglobin

3. presence of lipid

4. presence of hemoglobin

Q.

Exchange of material between the blood and surrounding cells takes place across the thin walls of ___.

Q.

When air is blown from the mouth into a test-tube containing limewater, the limewater turns milky due to the presence of $C{O}_2$. What is the component formed as a product of the reaction that turns the solution milky?

1. Oxygen

2. Carbon dioxide

3. Nitrogen
   

4. Water vapour

Q. State whether the following statements are true or false.
(v) Phloem is formed of dead tubular cells.

1. False
2. True

Q. What does ‘capillaries join up to form veins which empty into the heart’ mean ?

Q.

Xylem is water-conducting tissue in higher plants.

1. True
2. False

Q. Which type of blood vessels have door like structures that prevent the backflow of the blood?

1. Veins
2. Arteries
3. Capillaries
4. Aorta